/* eslint-disable no-undef */
/* eslint-disable no-restricted-globals */
// This is the "Offline page" service worker

// eslint-disable-next-line no-undef
importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.2/workbox-sw.js');

const CACHE = "pwabuilder-page";

// TODO: replace the following with the correct offline fallback page i.e.: const offlineFallbackPage = "offline.html";
const offlineFallbackPage = "index.html";

self.addEventListener("message", (event) => {
  if (event.data && event.data.type === "SKIP_WAITING") {
    self.skipWaiting();
  }
});

self.addEventListener('install', async (event) => {
  event.waitUntil(
    caches.open(CACHE)
      .then((cache) => cache.add(offlineFallbackPage))
  );
});

if (workbox.navigationPreload.isSupported()) {
  workbox.navigationPreload.enable();
}

// self.addEventListener('fetch', (event) => {
//   if (event.request.mode === 'navigate') {
//     event.respondWith((async () => {
//       try {
//         const preloadResp = await event.preloadResponse;

//         if (preloadResp) {
//           return preloadResp;
//         }

//         const networkResp = await fetch(event.request);
//         return networkResp;
//       } catch (error) {

//         const cache = await caches.open(CACHE);
//         const cachedResp = await cache.match(offlineFallbackPage);
//         return cachedResp;
//       }
//     })());
//   }
// });